The maximum power is 450W+450W and RMS 70W+70W, which can be used for multi speaker impedance of 4-16 ohms, allowing you to enjoy high-performance speakers or components. It has roaring bass, crisp treble, and excellent richness, and most amplifiers can only be used for reminders. 2 microphone inputs are perfect for karaoke Allow 12V DC or 110V/60Hz AC power adapter input. Our AK-55 amplifier comes with an AC power cord, so you don't need to purchase an additional AC power cord. This stable power supply can maintain stable playback of all types of music.